Document Type and Number:
Japanese Patent JPS5512175
Kind Code:
Y2
Application Number:
JP7828674U
Publication Date:
March 17, 1980
Filing Date:
July 04, 1974
Export Citation:
International Classes:
G03B17/42; G03B9/66; G03B9/68; G03B17/00; G03B17/38; (IPC1-7): G03B17/42; G03B9/66; G03B17/00